Clean, peal a core the apples. Cut them into bite size pieces.
Add 2 tablespoons of water in a medium or small size pot and bring to medium heat. Add the apples, cinnamon and cover the pot. Leave to simmer for 15-20 minutes. The apples should be soft enough to mash with a fork with no effort.
Transfer the apples into a bowl, add the lemon juice and blend with a fork until desired consistency. For me, the perfect consistency is when you can still bite into little chunks of apple. If you are preparing the sauce for a baby, smooth consistency may be better and you may need to blend it.